CS4 on Mac OS X is only 32-bit. CS5 is fully 64-bit. Also, if you're running more than 4G RAM and all your other applications are 64-bit compatible, you should set up the system to operate with the 64-bit kernel too. Information on this topic is available from Apple:
Mac OS X v10.6: Macs that use the 64-bit kernel http://support.apple.com/kb/HT3770 Mac OS X v10.6: Starting up with the 32-bit or 64-bit kernel http://support.apple.com/kb/HT3773 I found that configuring my system (8G RAM) to use the 64-bit kernel improved performance by a noticeable increment. On Fri, Mar 18, 2011 at 1:02 PM, Paul Stenquist <[email protected]> wrote: > > On Mar 18, 2011, at 3:44 PM, Bruce Walker wrote: > >> On 11-03-18 3:27 PM, Paul Stenquist wrote: >>> I upgraded the memory on my iMac 27 to 12 gigs. I did it mainly to get more >>> memory for PhotoShop for things like noise reduction, which can be poky, >>> due (I think) to scratch disk involvement. The computer reports 12 meg of >>> memory and says its okay, but PhotoShop still sees only 4 megs -- what I >>> had before. Do I have to reinstall PhotoShop to get it to see the new >>> memory? I've tried restarting both computer and PhotoShop to no avail. >>> >>> Paul >> >> Which version of PS? I believe you need CS5 running under Snow Leopard to >> see that much RAM. You also *may* have to tweak a startup setting to >> convince PS to run in 64-bit mode by default, though I don't recall having >> to do that. >> > I have CS4. At least I can dial it up to use the full 4 gig. And I'll > probably upgrade to CS5 soon. > Thanks, > Paul > >> -bmw >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- Godfrey godfreydigiorgi.posterous.com -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
